As best I can remember, Glaser may have done one of the studies that take a dozen or two earthquakes, and finds a surprising result without checking rigorously whether it was unlikely to occur at random. There have been a number of other studies examining orders of magnitude more earthquakes with the opposite result - no relation between tides and earthquakes.

The Tolstoy seafloor quake is legitimate. Small quakes just under the seafloor at mid-ocean ridges do sometimes correlate with the tides. Maya's paper came out a year or two ago in Science. However, only shallow, small earthquakes are seen to correlate very much.

I wouldn't perturb my vacation plans because of the lunar tides.